package netmap

import (
	"fmt"

	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client"
	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
	"github.com/nspcc-dev/neo-go/pkg/encoding/fixedn"
	"github.com/nspcc-dev/neo-go/pkg/util"
)

type NodeInfo = netmap.NodeInfo

// Client is a wrapper over StaticClient
// which makes calls with the names and arguments
// of the FrostFS Netmap contract.
//
// Working client must be created via constructor New.
// Using the Client that has been created with new(Client)
// expression (or just declaring a Client variable) is unsafe
// and can lead to panic.
type Client struct {
	client *client.StaticClient // static Netmap contract client
}

const (
	addPeerMethod          = "addPeer"
	configMethod           = "config"
	epochMethod            = "epoch"
	lastEpochBlockMethod   = "lastEpochBlock"
	innerRingListMethod    = "innerRingList"
	netMapCandidatesMethod = "netmapCandidates"
	netMapMethod           = "netmap"
	newEpochMethod         = "newEpoch"
	setConfigMethod        = "setConfig"
	updateInnerRingMethod  = "updateInnerRing"
	snapshotMethod         = "snapshot"
	updateStateMethod      = "updateState"

	epochSnapshotMethod = "snapshotByEpoch"

	configListMethod = "listConfig"
)

// NewFromMorph returns the wrapper instance from the raw morph client.
func NewFromMorph(cli *client.Client, contract util.Uint160, fee fixedn.Fixed8, opts ...Option) (*Client, error) {
	o := defaultOpts()

	for i := range opts {
		opts[i](o)
	}

	sc, err := client.NewStatic(cli, contract, fee, ([]client.StaticClientOption)(*o)...)
	if err != nil {
		return nil, fmt.Errorf("create 'netmap' contract client: %w", err)
	}

	return &Client{client: sc}, nil
}

// Option allows to set an optional
// parameter of Wrapper.
type Option func(*opts)

type opts []client.StaticClientOption

func defaultOpts() *opts {
	return &opts{client.TryNotary()}
}

// AsAlphabet returns option to sign main TX
// of notary requests with client's private
// key.
//
// Considered to be used by IR nodes only.
func AsAlphabet() Option {
	return func(o *opts) {
		*o = append(*o, client.AsAlphabet())
	}
}

// ContractAddress returns the address of the associated contract.
func (c Client) ContractAddress() util.Uint160 {
	return c.client.ContractAddress()
}

// Morph returns raw morph client.
func (c Client) Morph() *client.Client {
	return c.client.Morph()
}